Car turn on then off

Hello, impossible to really know what could be happening without performing some hands on testing with a diagnostic tool and workshop manual handy. www.repairpal.com/repair-shops

This could mean many things, such as an issue with the air/fuel delivery system, ignition system, or electrical system (most likely alternator-related issues if it is an electrical issue). Are there any codes? Any new dashboard lights? How many miles does the vehicle have?